Abstract
It has long been recognized that the presence of hemoglobin (Hb) Bart's in newborn's blood is associated with α-thalassemia. However, the automated high-performance liquid chromatography or low-performance liquid chromatography system is unable to quantify the amount of Hbs Bart's and H, which are eluted at the retention time close to 0min. This study used automatic capillary electrophoresis (CE) system to diagnose various types of α-thalassemia in 587 cord blood samples, including 429 normal α-globin genotype, 120 cases of thalassemia with one α-globin gene defect, 34 cases with two α-globin genes defect, and four cases with three α-globin genes defect. The result showed that the level of Hb Bart's in cord blood was increased accordingly with the increasing numbers of the defective α-globin genes. In addition, Hb Bart's level at 0.2%, as measured by CE, can be used as a cut-off point for α-thalassemia diagnosis in newborns.
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